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A069685
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Denominators of coefficients in -log(1+x)log(1-x) power series.
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1
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1, 12, 180, 1680, 12600, 166320, 2522520, 576576, 22054032, 465585120, 2560718160, 64250746560, 348024877200, 1124388064800, 4990906206000, 165032631878400, 350694342741600, 2599263952084800, 101515697684200800
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OFFSET
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1,2
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LINKS
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FORMULA
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PROG
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(PARI) my(x='x+O('x^50), v=Vec(-log(1+x)*log(1-x))); apply(denominator, vector(#v\2, k, v[2*k-1])) \\ Michel Marcus, Feb 16 2021
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CROSSREFS
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KEYWORD
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easy,frac,nonn
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AUTHOR
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STATUS
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approved
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